It features three different programs to meet varying lighting needs. The first program is a continuous light that can last up to three hours, which is ideal for long-duration activities such as night walks or evening hikes. The other two programs are fast and slow flashing, which can last up to approximately five hours. These programs are particularly useful for improving your pet's visibility in low-light conditions or for signaling their presence from a distance.In addition, this accessory is designed with a USB port, which makes recharging much easier. You can easily connect the accessory to a USB power source such as a laptop, a portable battery, or a mobile phone charger to recharge it quickly and easily. This feature allows you to always have the accessory ready for use when you need it, without having to worry about regularly replacing batteries.